A Bit of a Sticky Situation...(removing official LEGO glue)

Quite a while ago I purchased a partial of a LEGO ambassador key chain (just the head glued to the hat). I never really got around to trying to remove the hat up until now. I'm wanting to remove the head from the hat while keeping the hat in best condition possible. NOTE: I don't give a flying fiddle for the head!

This official LEGO glue would be from around 1984, any suggestions help, Thanks!

Here's a picture of what the entire key chain looks like. I really want that hat! ;P

He was already dismembered when I received him ha ha. I'm actually thinking of piecing together this guy with non glued parts.

@MattsWhat dremmeling sounds messy. If I knew the dimensions of the hat (has never been on another figure so good luck to me) I could lathe the head away, ha ha. I like the blow dryer idea, maybe if I stuck the head in a vice...

^superglue works as the binding agent, but plastic glues actually melt the plastic slightly and it is the plastic mixture that binds. Cooling and heating are unlikely to work assuming they used the right glue for the job.

So step one was pretty successful. I was able to remove most of the head and I'm able to see the bottom side of the hat. This was kind of most important to me as I have a high interest in Lego's molds and such. The under side of that hat is almost exactly like the LDD digital model except for the two black square holes. Next step is to drill the stud out of the hat using a drill bit slightly smaller than a stud. Hope fully then I will have my own ambassador hat to use as I please! :)

the the method I came up with was pretty much squishing the head with a vice (carefully) until there was enough of a gap that I was able to pry the hat off.

i recorded the process so once I get the drilling done I'll upload it.

Alright, so there was really only one way I could clamp this thing in without it flipping around and what not. I made a wax mold (with some excess wax from candles) in a socket wrench and stuffed the hat in to create an even object to hold.

I then slowly drilled the stud and there is still a bit left, some just gonna need to figure out how to get rid of it.